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EM: DeNitrification-DeComposition simulation of N2O flux Ireland (EM-598)
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EM Identity and Description
EM Identification
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EM ID
em.detail.idHelp
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EM-598 |
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EM Short Name
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DeNitrification-DeComposition simulation (DNDC) v.8.9 flux simulation, Ireland |
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EM Full Name
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DeNitrification-DeComposition simulation of N2O flux Ireland |
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EM Source or Collection
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None |
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EM Source Document ID
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358 |
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Document Author
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Abdalla, M., Yeluripati, J., Smith, P., Burke, J., Williams, M. |
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Document Year
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2010 |
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Document Title
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Testing DayCent and DNDC model simulations of N2O fluxes and assessing the impacts of climate change on the gas flux and biomass production from a humid pasture |
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Document Status
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Peer reviewed and published |
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Comments on Status
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Published journal manuscript |
Software and Access
| http://www.dndc.sr.unh.edu | |
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Contact Name
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M. Abdalla |
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Contact Address
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Dept. of Botany, School of Natural Science, Trinity College Dublin, Dublin2, Ireland |
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Contact Email
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abdallm@tcd.ie |
EM Description
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Summary Description
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Simulation models are one of the approaches used to investigate greenhouse gas emissions and potential effects of global warming on terrestrial ecosystems. DayCent which is the daily time-step version of the CENTURY biogeochemical model, and DNDC (the DeNitrification–DeComposition model) were tested against observed nitrous oxide flux data from a field experiment on cut and extensively grazed pasture located at the Teagasc Oak Park Research Centre, Co. Carlow, Ireland. The soil was classified as a free draining sandy clay loam soil with a pH of 7.3 and a mean organic carbon and nitrogen content at 0–20 cm of 38 and 4.4 g kg−1 dry soil, respectively. The aims of this study were to validate DayCent and DNDC models for estimating N2O emissions from fertilized humid pasture, and to investigate the impacts of future climate change on N2O fluxes and biomass production. Measurements of N2O flux were carried out from November 2003 to November 2004 using static chambers. Three climate scenarios, a baseline of measured climatic data from the weather station at Carlow, and high and low temperature sensitivity scenarios predicted by the Community Climate Change Consortium For Ireland (C4I) based on the Hadley Centre Global Climate Model (HadCM3) and the Intergovernment Panel on Climate Change (IPCC) A1B emission scenario were investigated. DNDC overestimated the measured flux with relative deviations of +132 and +258% due to overestimation of the effects of SOC. DayCent, though requiring some calibration for Irish conditions, simulated N2O fluxes more consistently than did DNDC. |
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Specific Policy or Decision Context Cited
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climate change |
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Biophysical Context
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Agricultural field, Ann rainfall 824mm, mean air temp 9.4°C |
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EM Scenario Drivers
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fertilization |
EM Relationship to Other EMs or Applications
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Method Only, Application of Method or Model Run
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Method + Application |
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New or Pre-existing EM?
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Application of existing model |
Related EMs (for example, other versions or derivations of this EM) described in ESML
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Document ID for related EM
em.detail.relatedEmDocumentIdHelp
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None |
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EM ID for related EM
em.detail.relatedEmEmIdHelp
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EM-593 |
EM Modeling Approach
EM Relationship to Time
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EM Temporal Extent
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1961-1990 |
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EM Time Dependence
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time-dependent |
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EM Time Reference (Future/Past)
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both |
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EM Time Continuity
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discrete |
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EM Temporal Grain Size Value
em.detail.tempGrainSizeHelp
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1 |
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EM Temporal Grain Size Unit
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Day |
EM Spatial Extent
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Bounding Type
em.detail.boundingTypeHelp
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Point or points |
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Spatial Extent Name
em.detail.extentNameHelp
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Oak Park Research centre |
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Spatial Extent Area (Magnitude)
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1-10 ha |
Spatial Distribution of Computations
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EM Spatial Distribution
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spatially lumped (in all cases) |
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Spatial Grain Type
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Not applicable |
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Spatial Grain Size
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Not applicable |
EM Structure and Computation Approach
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EM Computational Approach
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Numeric |
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EM Determinism
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deterministic |
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Statistical Estimation of EM
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Model Checking Procedures Used
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Model Calibration Reported?
em.detail.calibrationHelp
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Yes |
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Model Goodness of Fit Reported?
em.detail.goodnessFitHelp
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Yes ?Comment:Actual value was not given, just that results were very poor. Simulation results were 258% of observed |
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Goodness of Fit (metric| value | unit)
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Model Operational Validation Reported?
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Yes |
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Model Uncertainty Analysis Reported?
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No |
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Model Sensitivity Analysis Reported?
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No |
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Model Sensitivity Analysis Include Interactions?
em.detail.interactionConsiderHelp
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Not applicable |
EM Locations, Environments, Ecology
Location of EM Application
Terrestrial location (Classification hierarchy: Continent > Country > U.S. State [United States only])
em.detail.relationToSpaceTerrestrialHelp
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Marine location (Classification hierarchy: Realm > Region > Province > Ecoregion)
em.detail.relationToSpaceMarineHelp
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| None |
Centroid Lat/Long (Decimal Degree)
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Centroid Latitude
em.detail.ddLatHelp
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52.86 |
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Centroid Longitude
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6.54 |
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Centroid Datum
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None provided |
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Centroid Coordinates Status
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Provided |
Environments and Scales Modeled
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EM Environmental Sub-Class
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Agroecosystems |
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Specific Environment Type
em.detail.specificEnvTypeHelp
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farm pasture |
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EM Ecological Scale
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Ecological scale is finer than that of the Environmental Sub-class |
Scale and taxa of organisms modeled
Scale of differentiation of organisms modeled
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EM Organismal Scale
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Not applicable |
Taxonomic level and name of organisms or groups identified
taxonomyHelp
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| None Available |
EnviroAtlas URL
em.detail.enviroAtlasURLHelp
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| GAP Ecological Systems, Average Annual Precipitation, Agricultural water use (million gallons/day) |
EM Ecosystem Goods and Services (EGS) potentially modeled, by classification system
CICES v 4.3 - Common International Classification of Ecosystem Services (Section > Division > Group > Class)
em.detail.cicesHelp
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(Environmental Subclass > Ecological End-Product (EEP) > EEP Subclass > EEP Modifier)
fegs2Help
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EM Variable Names (and Units)
Predictor
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Intermediate
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Intermediate (Computed) Variables (and Units)
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None |
Response
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